Actually, your statement that Trevor Rosenthal had "a lot" of appearances where he entered in the 8th inning in a save situation is incorrect. Only once all year did he enter in the 8th in a save situation and stay for the 9th, against Arizona in early April -- and he blew the save. (Arizona eventually won in the 16th.) In every other appearance where he went more than one inning, it either wasn't a save situation or came earlier in a game where someone else (Mujica) got the save. Matheny may or may not be correct in holding him out of extended saves, but he's at least been consistent.

I guess, if one considers 12 such appearances, out of 74 total, "a lot." Interesting, though, that they came to a near-halt once he got the magic "C" on his shirt, visible or otherwise. As I said, Matheny has been quite consistent about that.